可以在CPTGraph中添加UIImage吗？

Question

我尝试使用Core-Plot将图像添加到图形中，我希望图像在拖动或收缩时与图形一起移动。我已经尝试过下面的代码，但它没有用。谁能告诉我怎么做？

CALayer *subLayer = [CALayer layer];
subLayer.contents = [UIImage imageNamed:@"image.png"];
subLayer.position = CGPointMake(100, 120);
[_graph addSublayer:subLayer];

Answer 1

使用绘图空间注释：

CPTBorderedLayer *imageLayer = [[CPTBorderedLayer alloc] initWithFrame:imageFrame];
imageLayer.fill = [CPTFill fillWithImage:[CPTImage imageNamed:@"image.png"]];

NSArray *plotPoint = @[xCoordinate, yCoordinate];
CPTPlotSpaceAnnotation *imageAnnotation = [[CPTPlotSpaceAnnotation alloc] initWithPlotSpace:plotSpace
                                                                            anchorPlotPoint:plotPoint];
imageAnnotation.contentLayer = imageLayer;